A piston cylinder assembly contains nitrogen, initially at 20 lbf/in^2, @ 80 degrees Fahrenheit and occupying a volume of 2ft^3. The nitrogen is compressed to a final state where the pressure is 160 lbf/in^2 and temp is 300 degrees Farenheit. During the compression, a heat transfer of 1.6 Btu occurs from the nitrogen to its surroundings. Assuming ideal gas behavior, determine A.) the mass, in lb of the nitrogen B.)the work in Btu.